Rejection of intestinal allotransplants is driven by memory T helper type 17 immunity and responds to infliximab.
Am J Transplant
; 21(3): 1238-1254, 2021 03.
Article
em En
| MEDLINE
| ID: mdl-32882110
ABSTRACT
Intestinal transplantation (ITx) can be life-saving for patients with advanced intestinal failure experiencing complications of parenteral nutrition. New surgical techniques and conventional immunosuppression have enabled some success, but outcomes post-ITx remain disappointing. Refractory cellular immune responses, immunosuppression-linked infections, and posttransplant malignancies have precluded widespread ITx application. To shed light on the dynamics of ITx allograft rejection and treatment resistance, peripheral blood samples and intestinal allograft biopsies from 51 ITx patients with severe rejection, alongside 37 stable controls, were analyzed using immunohistochemistry, polychromatic flow cytometry, and reverse transcription-PCR. Our findings inform both immunomonitoring and treatment. In terms of immunomonitoring, we found that while ITx rejection is associated with proinflammatory and activated effector memory T cells in the blood, evidence of treatment efficacy can only be found in the allograft itself, meaning that blood-based monitoring may be insufficient. In terms of treatment, we found that the prominence of intra-graft memory TNF-α and IL-17 double-positive T helper type 17 (Th17) cells is a leading feature of refractory rejection. Anti-TNF-α therapies appear to provide novel and safer treatment strategies for refractory ITx rejection; with responses in 14 of 14 patients. Clinical protocols targeting TNF-α, IL-17, and Th17 warrant further testing.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Inibidores do Fator de Necrose Tumoral
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Rejeição de Enxerto
Tipo de estudo:
Etiology_studies
/
Guideline
Limite:
Humans
Idioma:
En
Ano de publicação:
2021
Tipo de documento:
Article